<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<!--图片在页面的上级目录-->
<img src="../a.jpg" title="水手服" width="100%">
<!--图片和页面在同级目录-->
<img src="l.jpg" height="600" width=100% title="背景图">
<!--图片在页面的下级目录-->
<img src="L/b.jpg">
<img src="https://tse3-mm.cn.bing.net/th/id/OIP-C.e9k2f01XXkdpGOiI-bk3hgHaFj?w=243&h=182&c=7&r=0&o=5&pid=1.7">

</body>
</html>